It demonstrates how Spectrum Lab can provide digital filtering to observe up to 20 individual sub-bands to help overcome interference issues. David also provides details of gain and noise stability measurements for the FUNcube Dongle and observations of emissions from the quiet Sun and the Cygnus arm of the Milky Way.

This paper adds to the work that David has undertaken in the past and is interesting reading for anyone wanting to experiment with SDR solutions for amateur radio astronomy.